<template lang="pug">
  div(class="page-login")
    div(class="page-login--layer page-login--layer-area")
      ul(class="circles")
        li(v-for="n in 10",:key="n")
    div(class="page-login--layer page-login--layer-time",flex="main:center cross:center") {{time}}

    div(class="page-login--layer")
      div(class="page-login--content" flex="dir:top main:justify cross:center box:justify")
        div(class="page-login--content-header")
          p(class="page-login--content-header-motto")
            span 时间是一切财富中最宝贵的财富。
            span —— 德奥弗拉斯多
        div(class="page-login--content-main",flex="dir:top main:center cross:center")
          <!-- logo -->
          img(class="page-login--logo",src="./image/logo@2x.png")
          <!-- 表单 -->
          div(class="page-login--form")
            el-card(shadow="never")
                el-form(ref="loginForm",label-position="top",:rules="rules",:model="formLogin",size="default",v-if="loginMode == 'account'")
                  el-form-item(prop="username")
                    el-input(type="text", v-model="formLogin.username", placeholder="用户名")
                      i(slot="prepend",class="fa fa-user-circle-o")
                  el-form-item(prop="password")
                    el-input(type="password",v-model="formLogin.password",placeholder="密码", @keyup.enter.native="submit")
                      i(slot="prepend",class="fa fa-keyboard-o")
                  el-form-item(prop="code")
                    el-input(type="text",v-model="formLogin.code",placeholder="- - - -")
                      template(slot="prepend") 验证码
                      template(slot="append")
                        img(class="login-code", src="./image/login-code.png")
                  el-button(size="default",@click="submit",type="primary",class="button-login") 登录

                div(class="admin-qrcode",v-if="loginMode == 'qrcode'")
                  img(v-if="qrcodeInfo&&qrcodeInfo.qrcode",:src="baseUrl + qrcodeInfo.qrcode")
                  div(class="qrcode-placeholder",v-else)
                    i(class="el-icon-loading")

            p(class="page-login--options",flex="main:justify cross:center")
              span &nbsp;
              <!--微信登录-->
              el-button(type="text",v-if="loginMode == 'account'",@click="switchWeixinLogin") 微信登录
              el-button(type="text",v-if="loginMode == 'qrcode'",@click="loginMode = 'account'") 账号登录
        div(class="page-login--content-footer")
</template>

<script>
import dayjs from "dayjs";
import { mapActions } from "vuex";
import "animation.css/main.css";
import axios from "@/plugin/axios";
import util from "@/libs/util";

const baseUrl = process.env.VUE_APP_API;
export default {
  data() {
    return {
      timeInterval: null,
      time: dayjs().format("HH:mm:ss"),
      // 表单
      formLogin: {
        username: "admin",
        password: "",
        code: "v9am"
      },
      // 校验
      rules: {
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" }
        ],
        password: [{ required: true, message: "请输入密码", trigger: "blur" }],
        code: [{ required: true, message: "请输入验证码", trigger: "blur" }]
      },
      // 登录模式 qrcpde:扫描二维码 account:用户名密码
      loginMode: "account",
      querying: false,
      qrcodeInfo: null,
      baseUrl: baseUrl
    };
  },
  mounted() {
    this.timeInterval = setInterval(() => {
      this.refreshTime();
    }, 1000);
  },
  beforeDestroy() {
    clearInterval(this.timeInterval);
  },
  methods: {
    ...mapActions("d2admin/account", ["login"]),
    refreshTime() {
      this.time = dayjs().format("HH:mm:ss");
    },
    /**
     * @description 接收选择一个用户快速登录的事件
     * @param {Object} user 用户信息
     */
    handleUserBtnClick(user) {
      this.formLogin.username = user.username;
      this.formLogin.password = user.password;
      this.submit();
    },
    /**
     * @description 提交表单
     */
    // 提交登录信息
    submit() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          // 登录
          // 注意 这里的演示没有传验证码
          // 具体需要传递的数据请自行修改代码
          axios({
            url: "/token/login",
            method: "post",
            data: {
              username: this.formLogin.username,
              password: this.formLogin.password
            }
          }).then(res => {
            util.cookies.set("token", res.token);
            // 重定向对象不存在则返回顶层路径
            this.$router.replace(this.$route.query.redirect || "/");
          });
        } else {
          // 登录表单校验失败
          this.$message.error("表单校验失败");
        }
      });
    },
    /**获取二维码 */
    getLoginQrCode() {
      this.querying = true;
      axios({ url: "/adminLogin/getLoginQrCode", method: "post" })
        .then(res => this.getLoginQrCodeSuccess(res))
        .catch(e => (this.querying = false));
    },
    getLoginQrCodeSuccess(res) {
      this.querying = false;
      this.qrcodeInfo = res;
    },
    switchWeixinLogin() {
      this.getLoginQrCode();
      this.loginMode = "qrcode";
    }
  }
};
</script>

<style lang="scss">
.page-login {
  @extend %unable-select;
  $backgroundColor: #f0f2f5;
  // ---
  background-color: $backgroundColor;
  height: 100%;
  position: relative;
  // 层
  .page-login--layer {
    @extend %full;
    overflow: auto;
  }
  .page-login--layer-area {
    overflow: hidden;
  }
  // 时间
  .page-login--layer-time {
    font-size: 24em;
    font-weight: bold;
    color: rgba(0, 0, 0, 0.03);
    overflow: hidden;
  }
  // 登陆页面控件的容器
  .page-login--content {
    height: 100%;
    min-height: 500px;
  }
  // header
  .page-login--content-header {
    padding: 1em 0;
    .page-login--content-header-motto {
      margin: 0px;
      padding: 0px;
      color: $color-text-normal;
      text-align: center;
      font-size: 12px;
      span {
        color: $color-text-sub;
      }
    }
  }
  // main
  .page-login--logo {
    width: 240px;
    margin-bottom: 2em;
    margin-top: -2em;
  }
  // 登录表单
  .page-login--form {
    width: 280px;
    // 卡片
    .el-card {
      margin-bottom: 15px;
    }
    // 登录按钮
    .button-login {
      width: 100%;
    }
    // 输入框左边的图表区域缩窄
    .el-input-group__prepend {
      padding: 0px 14px;
    }
    .login-code {
      height: 40px - 2px;
      display: block;
      margin: 0px -20px;
      border-top-right-radius: 2px;
      border-bottom-right-radius: 2px;
    }
    // 登陆选项
    .page-login--options {
      margin: 0px;
      padding: 0px;
      font-size: 14px;
      color: $color-primary;
      margin-bottom: 15px;
      font-weight: bold;
    }
    .page-login--quick {
      width: 100%;
    }
  }
  // 快速选择用户面板
  .page-login--quick-user {
    @extend %flex-center-col;
    padding: 10px 0px;
    border-radius: 4px;
    &:hover {
      background-color: $color-bg;
      i {
        color: $color-text-normal;
      }
      span {
        color: $color-text-normal;
      }
    }
    i {
      font-size: 36px;
      color: $color-text-sub;
    }
    span {
      font-size: 12px;
      margin-top: 10px;
      color: $color-text-sub;
    }
  }
  // footer
  .page-login--content-footer {
    padding: 1em 0;
    .page-login--content-footer-options {
      padding: 0px;
      margin: 0px;
      margin-bottom: 10px;
      font-size: 14px;
      text-align: center;
      a {
        color: $color-text-normal;
        margin: 0 1em;
      }
    }
    .page-login--content-footer-copyright {
      padding: 0px;
      margin: 0px;
      font-size: 12px;
      color: $color-text-normal;
      a {
        color: $color-text-normal;
      }
    }
  }
  // 背景
  .circles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    li {
      position: absolute;
      display: block;
      list-style: none;
      width: 20px;
      height: 20px;
      background: #fff;
      animation: animate 25s linear infinite;
      bottom: -200px;
      @keyframes animate {
        0% {
          transform: translateY(0) rotate(0deg);
          opacity: 1;
          border-radius: 0;
        }
        100% {
          transform: translateY(-1000px) rotate(720deg);
          opacity: 0;
          border-radius: 50%;
        }
      }
      &:nth-child(1) {
        left: 15%;
        width: 80px;
        height: 80px;
        animation-delay: 0s;
      }
      &:nth-child(2) {
        left: 5%;
        width: 20px;
        height: 20px;
        animation-delay: 2s;
        animation-duration: 12s;
      }
      &:nth-child(3) {
        left: 70%;
        width: 20px;
        height: 20px;
        animation-delay: 4s;
      }
      &:nth-child(4) {
        left: 40%;
        width: 60px;
        height: 60px;
        animation-delay: 0s;
        animation-duration: 18s;
      }
      &:nth-child(5) {
        left: 65%;
        width: 20px;
        height: 20px;
        animation-delay: 0s;
      }
      &:nth-child(6) {
        left: 75%;
        width: 150px;
        height: 150px;
        animation-delay: 3s;
      }
      &:nth-child(7) {
        left: 35%;
        width: 200px;
        height: 200px;
        animation-delay: 7s;
      }
      &:nth-child(8) {
        left: 50%;
        width: 25px;
        height: 25px;
        animation-delay: 15s;
        animation-duration: 45s;
      }
      &:nth-child(9) {
        left: 20%;
        width: 15px;
        height: 15px;
        animation-delay: 2s;
        animation-duration: 35s;
      }
      &:nth-child(10) {
        left: 85%;
        width: 150px;
        height: 150px;
        animation-delay: 0s;
        animation-duration: 11s;
      }
    }
  }
}
.admin-qrcode img,
.qrcode-placeholder {
  width: 238px;
  height: 238px;
  display: flex;
  justify-content: center;
  align-items: center;
}
</style>
